<EditText
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="Patient Name"
android:id="@+id/nameET"/>
<EditText
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="Age"
android:inputType="number"
android:id="@+id/ageET" />
<Spinner
android:layout_width="match_parent"
android:layout_height="50dp"
android:id="@+id/spinnerId" />
<Button
android:layout_width="150dp"
android:layout_height="50dp"
android:layout_gravity="center_horizontal"
android:text="Save"
android:textColor="#ffff"
android:background="@color/colorAccent"/>
<Button
android:layout_width="100dp"
android:layout_height="50dp"
android:text="Show notifications"
android:id="@+id/btn" />
这是activity_main.xml
EditText nameET,ageET;
Spinner spinner;
Button login;
Button btn;
String[] genderArray = {"Male","Female"};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
nameET = findViewById(R.id.nameET);
ageET = findViewById(R.id.ageET);
spinner = findViewById(R.id.spinnerId);
btn = findViewById(R.id.btn);
ArrayAdapter arrayAdapter = new ArrayAdapter(MainActivity.this,android.R.layout.simple_spinner_dropdown_item,genderArray);
arrayAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spinner.setAdapter(arrayAdapter);
btn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
makeNotification();
}
});
}
public void makeNotification(){
NotificationCompat.Builder builder = new NotificationCompat.Builder(MainActivity.this)
.setContentTitle("Hi")
.setSmallIcon(R.mipmap.ic_launcher)
.setContentText("Collect your daily coins");
Intent intent = new Intent(MainActivity.this,MainActivity.class);
PendingIntent pendingIntent = PendingIntent.getActivity(MainActivity.this,0,intent,PendingIntent.FLAG_UPDATE_CURRENT);
builder.setContentIntent(pendingIntent);
NotificationManager manager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
manager.notify(0,builder.build());
}
}这是MainActivity.java单击显示通知按钮时,我已将此代码用于不带Firebase的本地通知。它不起作用是什么问题以及如何解决。我找不到任何错误但输出不起作用任何人都可以解决我的问题,请查看并帮助我。
您的代码似乎不错。
很可能,您正在设备版本Oreo或更高版本上使用此代码。
您缺少在Oreo版本及更高版本上必须使用通知渠道的部分。
下面是将您的代码转换为适用于所有版本的代码段。
public class MainActivity extends AppCompatActivity {
public static final String NOTIFICATION_CHANNEL_ID = "channel_id";
public static final String CHANNEL_NAME = "Notification Channel";
public static final int NOTIFICATION_ID = 101;
NotificationManager notificationManager;
Button button;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
button = (Button) findViewById(R.id.btn);
notificationManager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
button.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
createNotificationChannel();
makeNotification();
}
});
}
private void createNotificationChannel() {
int importance = NotificationManager.IMPORTANCE_DEFAULT;
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
NotificationChannel notificationChannel = new NotificationChannel(NOTIFICATION_CHANNEL_ID, CHANNEL_NAME, importance);
notificationChannel.setLockscreenVisibility(Notification.VISIBILITY_PUBLIC);
notificationManager.createNotificationChannel(notificationChannel);
}
}
public void makeNotification() {
NotificationCompat.Builder builder = new NotificationCompat.Builder(MainActivity.this, NOTIFICATION_CHANNEL_ID)
.setContentTitle("Hi")
.setSmallIcon(R.mipmap.ic_launcher)
.setContentText("Collect your daily coins");
Intent intent = new Intent(MainActivity.this, ActivityOne.class);
PendingIntent pendingIntent = PendingIntent.getActivity(MainActivity.this, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT);
builder.setContentIntent(pendingIntent);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
builder.setGroup(NOTIFICATION_CHANNEL_ID);
}
NotificationManager manager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
manager.notify(0, builder.build());
}
}
请咨询此链接以获取有关通知渠道的详细信息。https://medium.com/exploring-android/exploring-android-o-notification-channels-94cd274f604c